The rate of intracranial hemorrhage is higher among infants delivered by vacuum extraction, forceps, or cesarean section during labor than among infants delivered spontaneously, but the rate among infants delivered by cesarean section before labor is not higher, suggesting that the common risk factor for hemorrhage is abnormal labor.
These results suggest that intramembranous absorption occurs and may play an important role in rhesus AF volume regulation and composition. Furthermore, this animal model, which closely resembles the human, may provide valuable insight into abnormalities of human AF volume regulation.
These studies support activation of the SDF-1/CXCR4 axis as a means to promote blood vessel growth and enhance collateral blood flow, at least in part, via direct effects on vascular endothelial cells.
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